<?php
namespace page;
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2017 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: zhangyajun <448901948@qq.com>
// +----------------------------------------------------------------------

use think\Paginator;

class Page extends Paginator
{

    //首页
    protected function home() {
        if ($this->currentPage() > 1) {
            return "<a href='" . $this->url(1) . "' title='首页'>首页</a>";
        } else {
            return "<a>首页</a>";
        }
    }

    //上一页
    protected function prev() {
        if ($this->currentPage() > 1) {
            return "<a href='" . $this->url($this->currentPage - 1) . "' title='上一页'>上一页</a>";
        } else {
            return "<a>上一页</a>";
        }
    }

    //下一页
    protected function next() {
        if ($this->hasMore) {
            return "<a href='" . $this->url($this->currentPage + 1) . "' title='下一页'>下一页</a>";
        } else {
            return"<p>下一页</p>";
        }
    }

    //尾页
    protected function last() {
        if ($this->hasMore) {
            return "<a href='" . $this->url($this->lastPage) . "' title='尾页'>尾页</a>";
        } else {
            return "<p>尾页</p>";
        }
    }

    //统计信息
    protected function info(){
        $info = '<p class="fl pagNum">共4条记录&nbsp;&nbsp;1/1页</p>'.
                '<p class="fl JumpPage clearfix">'.
                '<a href="'. $this->url(1).'">首页</a>';
        if ($this->currentPage() > 1) {
            $info .= '<a href="'.$this->url($this->currentPage - 1).'"><img class="fl mr5" src="__IMG__/shang.png">上一页</a>';
        } else {
            $info .= '<a href="javascript:void(0);"><img class="fl mr5" src="__IMG__/shang.png">上一页</a>';
        }
        if ($this->hasMore) {
            $info .= '<a href="'.$this->url($this->currentPage + 1).'">下一页<img src="__IMG__/xia.png"  class="fr ml5"></a>';
        } else {
            $info .= '<a href="javascript:void(0);">下一页<img src="__IMG__/xia.png"  class="fr ml5"></a>';
        }
        $info .= '<a href="'.$this->url($this->lastPage).'">尾页</a></p>';
        return $info;
    }

    /**
     * 页码按钮
     * @return string
     */
    protected function getLinks()
    {
        $block = [
            'first'  => null,
            'slider' => null,
            'last'   => null
        ];
        $side   = 3;
        $window = $side * 2;
        if ($this->lastPage < $window + 6) {
            $block['first'] = $this->getUrlRange(1, $this->lastPage);
        } elseif ($this->currentPage <= $window) {
            $block['first'] = $this->getUrlRange(1, $window + 2);
            $block['last']  = $this->getUrlRange($this->lastPage - 1, $this->lastPage);
        } elseif ($this->currentPage > ($this->lastPage - $window)) {
            $block['first'] = $this->getUrlRange(1, 2);
            $block['last']  = $this->getUrlRange($this->lastPage - ($window + 2), $this->lastPage);
        } else {
            $block['first']  = $this->getUrlRange(1, 2);
            $block['slider'] = $this->getUrlRange($this->currentPage - $side, $this->currentPage + $side);
            $block['last']   = $this->getUrlRange($this->lastPage - 1, $this->lastPage);
        }
        $html = '';
        if (is_array($block['first'])) {
            $html .= $this->getUrlLinks($block['first']);
        }
        if (is_array($block['slider'])) {
            $html .= $this->getDots();
            $html .= $this->getUrlLinks($block['slider']);
        }
        if (is_array($block['last'])) {
            $html .= $this->getDots();
            $html .= $this->getUrlLinks($block['last']);
        }
        return $html;
    }

    protected function getLinkss(){
        $thego = '<p class="fl pageber">'.
            '跳转至第<select name="p" onchange="go_pagep(this.value)">';
        for($i=1;$i<=$this->lastPage;$i++){
            $thego .= '<option value ="'.$this->url($i).'" ';
            $thego .= $i == $this->currentPage() ? 'selected="selected"' :'';
            $thego .= '>'.$i.'</option>';
        }
        $thego.='</select>页</p>';
        $thego.= '<script type="text/javascript">
		   function changeURLArg(url,arg,arg_val){ 
				var pattern=arg+"=([^&]*)"; 
				var replaceText=arg+"="+arg_val; 
				if(url.match(pattern)){ 
				var tmp="/("+ arg+"=)([^&]*)/gi"; 
				        tmp=url.replace(eval(tmp),replaceText); 
				return tmp; 
				    }else{ 
				if(url.match("[\?]")){ 
				return url+"&"+replaceText; 
				        }else{ 
				return url+"?"+replaceText; 
				        } 
				    } 
				return url+"\n"+arg+"\n"+arg_val; 
			} 
		   function go_pagep(page){
				var listrows = $("#listrows option:selected").val();
				if(page.indexOf("listrows") <= 0){
					if(listrows > 0){
						window.location = page+"&listrows="+listrows;
					}else{
						window.location = page;
					}
				}else{
					window.location = changeURLArg(page,"listrows",listrows);
				}
			}
        </script>';
        return $thego;
    }

    /**
     * 渲染分页html
     * @return mixed
     */
    public function render()
    {
        if ($this->hasPages()) {
            if ($this->simple) {
                return sprintf(
                    '%s<div class="pag clearfix">%s %s %s</div>',
                    $this->css(),
                    $this->prev(),
                    $this->next(),
                    $this->getLinks()
                );
            } else {
                return sprintf(
                    //'%s<div class="pag clearfix">%s %s %s %s %s %s</div>',
                    '%s<div class="pag clearfix">%s %s</div>',
                    $this->css(),
                    $this->info(),
                    //$this->home(),
                    //$this->prev(),
                    //$this->next(),
                    //$this->last(),
                    $this->getLinkss()
                );
            }
        }
    }

    /**
     * 生成一个可点击的按钮
     *
     * @param  string $url
     * @param  int    $page
     * @return string
     */
    protected function getAvailablePageWrapper($url, $page)
    {
        return '<a href="' . htmlentities($url) . '" title="第"'. $page .'"页" >' . $page . '</a>';
    }

    /**
     * 生成一个禁用的按钮
     *
     * @param  string $text
     * @return string
     */
    protected function getDisabledTextWrapper($text)
    {
        return '<p class="pageEllipsis">' . $text . '</p>';
    }

    /**
     * 生成一个激活的按钮
     *
     * @param  string $text
     * @return string
     */
    protected function getActivePageWrapper($text)
    {
        return '<a href="" class="cur">' . $text . '</a>';
    }

    /**
     * 生成省略号按钮
     *
     * @return string
     */
    protected function getDots()
    {
        return $this->getDisabledTextWrapper('...');
    }

    /**
     * 批量生成页码按钮.
     *
     * @param  array $urls
     * @return string
     */
    protected function getUrlLinks(array $urls)
    {
        $html = '';

        foreach ($urls as $page => $url) {
            $html .= $this->getPageLinkWrapper($url, $page);
        }

        return $html;
    }

    /**
     * 生成普通页码按钮
     *
     * @param  string $url
     * @param  int    $page
     * @return string
     */
    protected function getPageLinkWrapper($url, $page)
    {
        if ($page == $this->currentPage()) {
            return $this->getActivePageWrapper($page);
        }

        return $this->getAvailablePageWrapper($url, $page);
    }

    /**
     * 分页样式
     */
    protected function css(){
        return '  <style type="text/css">
            .pag{
                width: 660px;
                margin: 20px auto 40px;
            }
            .pagNum{
                color: #535353;
                font-size: 12px;
                margin-right: 20px;
                margin-top: 5px;
            }
            
            .JumpPage{
                border: 1px solid #c6c6c6;
                border-radius: 3px;
                margin-right: 20px;
            }
            .JumpPage>a{
                display: block;
                float: left;
                padding: 5px 10px;
                border-right: 1px solid #c6c6c6;
                font-size: 12px;
                color: #535353;
            }
            .JumpPage>a:last-child{
                border-right:none;
                
            }
            .pageber{
                margin-right: 20px;
                font-size: 12px;
                color: #535353;
                margin-top: 4px;
            }
            .pageber>select{
                  border: 1px solid #c6c6c6;
    border-radius: 3px;
    padding: 3px 5px;
    margin: 0 5px;
    width: 55px;
    height: 23px;
    float: none;
    font-size: 12px;
            }
        </style>';
    }
}